**A general method for synthesis of folic acid, its conjugates and analogues**. A new and general method for the synthesis of folic acid, folic acid conjugates and folic acid analogues is described. The key step, __i.e.__ the condensation of N(2′)‐acetyl‐6‐formyl‐pterine (I: R^1^ COCH~3~) with am
Über Pterinchemie. 68 Mitteilung [1]. Regiospezifische Deuterierungen von Folsäure
✍ Scribed by Esam Khalifa; Hans-Jürg Furrer; Jost H. Bieri; Max Viscontini
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- German
- Weight
- 236 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Regiospecific deuteriation of folic acid
Introduction of a nitroso function at the N (10)‐position of folic acid activates the C(9)‐hydrogen atoms in such a way, that the exchange of H with D at this position, in NaOD‐solution, is extremely facilitated. This fact is utilized in the synthesis of 9,9‐dideuterio‐folic acid (IV), 7,9,9‐trideuterio‐folic acid (VII) and 7‐deuterio‐folic acid (IX). These three products are necessary for the ^1^H‐NMR.‐spectroscopical determination of the conformation of 5,6,7,8‐tetrahydrofolic acid and its derivatives.
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Zusammenfassung. Eine einfache Synthese des 6-Formylpterins &us Neopterin wird beschrieben. Dieses isomerenfrei erhaltene Produkt wird als Edukt fur die Herstellung yon sehr reinen, isomerenfreien Folsaureanalogen verwendet. Das 6-Forniylpterin wird mit p-4minoarylLDerivaten zu 6-Azomethin-pterinen
## Abstract A new, simplified and unequivocal synthesis of folic acid free of isomers is described. A melt of N(2′)‐acetyl‐6‐formylpterine and dimethyl‐N‐(__p__‐aminobenzoyl)‐L‐glutamate was quantitatively converted to 6‐azomethin‐pterine‐ester IV. NaBH~4~‐reduction followed by basic hydrolysis of
**A new, regiospecific synthesis of L‐biopterine** Pure L‐biopterine (I) is obtained in 35–40% yield by condensation of 5‐desoxy‐L‐arabinose‐hydrazone acetate with 2,4,5‐triamino‐6‐hydroxy‐pyrimidine, followed by oxidation of the formed tetrahydro‐derivative and deacetylation of the L‐bioterine dia
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